You have to add all the sides because if you multiply you will find the area. <u>For the third one you are suppose to add all the sides not just two.</u><u> </u><u><em>The last one is completly wrong </em></u>
<em>The average velocity of the object is multiplied by the time traveled to find the displacement. The equation x = ½( v + u)t can be manipulated, as shown below, to find any one of the four values if the other three are known.</em>